Multi-phase transformers


Multiphase transformers are used to connect multiphase devices to three-phase network (for example 6-phase or 12-phase rectifiers). These transformers are characterized by complexed construction of secondary windings. There are many possibilities of configurations of secondary windings, which enables to create multiphase circuits. The most common connections are: double-star connection double-delta connection or so called dump windings. Multiphase transformers are mostly used with power electronic converter systems.

Technical data

Design Three-phase transformers are produced in accordance with requirements of relevant transformer standards and EN/IEC 61378-1
Insulation class

F(155oC); H(180°C)

Climatic class/Environmental class

C1/E0 - land design; C2/E1 - maritime design

Ambient temperature 40oC
Protection degree IP 00
Protection class I
Frequency 50/60 Hz
Primary voltage up to 1000 V
Secondary voltage up to 1000 V
Terminals screw terminal blocks, cable lugs or
copper bus bars
Fastening by means of angles